No line-wrapping for keyword argument

Operating system: Win10 Version 10.0.18362 Build 18362
Python version: 3.7.3
Black version: 9.3b0
Does also happen on master: Yes

Input:

def g() -> None:
    name_of_local_variable = "Very long string value that should be placed on the next line"
    f(
        name_of_the_parameter="Very long string value that should be placed on the next line"
    )

Output:

def g() -> None:
    name_of_local_variable = (
        "Very long string value that should be placed on the next line"
    )
    f(
        name_of_the_parameter="Very long string value that should be placed on the next line"
    )

name_of_local_variable's value is put on the next line, but name_of_the_parameter is untouched.
This is true even if I use name_of_the_parameter=lambda x: "Very long string value that should be placed on the next line" which gives two opportunities for wrapping.

[zsol]

This is likely the same problem as #620. Will keep this open just in case we decide to do different formatting for kwargs/dict literals